Illuminating apparatus



AF. D. COLLINS- ILLUMINATING APPARATUS.

APPLICATION FILED MAR. 25, 1921.

.INVENTOR AT'ITORNEY Ill( IIIII rin F. D. COLLINS.

ILLUMl-NATING APPARATUS.

. APPLICATION FILED MAR. 25| 1921.. 675

Patented Apr. n, 11922.

2 SHEETS-SHEET 2.

INVENTOR ATTORNEY I WITNESSa-G .am c faire fi ILLUMINATING- APEARATUS.

iniiac'ra Specification of Letters Patent. patented Apr., 1l1i9 1922.

Application filed March. 25, 1921. Serial No. 455,605.

'T0 all whom it may concern.'

Be it known that l, FRANK D. COLLINS, a citizen of the United States, residing at Washington, in the District of Columbia, have invented new and useful 'Improvements in Illuminating Apparatus, of which the following is a speciiication.

rlhe object of my present invention is the provision of an illuminating apparatus for coloring in an attractive manner a frosted glass behind which the apparatus is arranged or for illuminating in colors a sign or show card or a show window, or :tor bringing about attractive lighting eiects on a stage with a view to enhancing the beauty of costume dances, and for other lighting eiiects.

To the attainment of the foregoing, the

invention consists in the improvement as` hereinafter described and definitely claimed. In the accompanying drawings, forming part of this speciiicationz- Figure 1 is a vertical section, partly in elevation, of the apparatus constituting the best practical embodiment of my invention that l have as yet devised.

Figures 2 and 3 are sections taken in the planes indicated by the lines 2-2 and 3-3, respectively, of Figure 1.

Figure a is an enlarged perspective of the bracket comprised in the apparatus.

Figure 5 is a horizontal section taken on the line 5 5 of Figure 1, looking downwardly.

Figure 6 is a horizontal section taken through a modiiied prism hereinafterv eX- plicitly referred to.

Similar numerals designate corresponding arts in Figures 1 to- 5 to which reference will rst be made.

Among other' elements the apparatus illustrated includes a casing 1 having ventilating openings 2 and superimposed on and fixed with respect to an appropriate base 3. A rlso superimposed on and xcd to the base 3 is a motor 4. which maybe ot any description compatible with thev purpose oi my invention. rEhev casing' 1. is shown as provided with side doors 5 to permitof ready access being gained to the interior of the casing. This, however, is not of the essence oi' my invention and therefore it is unnecessary to iurther describe the casing 1 and the doors 5 except to say that when the latter are employed they are normally secured in closed position by appropriate fasteners 6.

Arranged in the casing 1 and fixed on the base .3 is a bracket 7 on which is an over# hanging arm 8 with a vertically disposed aperture 9 therein. CarriedL by the upright portion oic the bracket 7 and disposed in front of said upright portionis a reflector 10. Movable vertically in the aperture 9 ot' the bracket 7 is a plunger 11 with a socket 12 in its lower end; the sai-d plunger being provided above the bracket arm 8 with a pin 13, and being provided below the'bracket arm 8 with an abutment 14 between which and the arm is interposed a tensioning spring 15. The plunger 11 is provided with a series or apertures as shown in Figure 3 in any one of which the pin 13 may be .placed according to the tension under which it is desired to place the spring 15.

Carried in the front wall 1K1 of the casing 1 is a tube 15', `provided atV its `ends with double convex lenses 16, and appropriately supported in 'front of the lens tube 15 is a prism 17 the apex of which is arranged immediately adjacent to the :forward lens 16 and in the longitudinal vertical center of the tube 15. lt is within the purview oi my invention to support the prism 17 in any approved manner, though ll prefer to employ Vfor the purpose a pedestal 18 fixed on the base 3 and having a socket 19 in its upper portion to receive the lower end ot the prism 17.

Fixed on'the base 3 and arranged inthe casing 1 is a lamp socket 2O which is peculiar in that its interior is smooth as brought out in Figure 3. Tliejsaid lamp socket 2O is provided with the conventional or any other appropriate appurtenances 21 for the connection ot wires in circuit with a source oi electric energy, and when the shank et the incandescent electric lamp 22 is arranged in v the said socket 2O it will be understood that one terminal of the filament 23 et the lamp will be arranged in the center of the lower end of the shank and in contact with a complementary terminal on thebase 3 while the other terminal of the filament 23 will be connected .with the .shank of the bulb which is of' metal or other conductive material and is eXteriorly smooth and .of circular forni in cross section so as to snugly occupy and be adapted to turn about its axis in the circular portion of the socket 20. At its upper end the bulb of the lamp is provided with the usualcentral rotuberance 24, the said protuberance 24 being arranged in the socket l2 at the lowei end of the plunger ll with the result that the lamp will be subjected to slight tension so as'lto properly maintain itV in position incident to its rotation.

Mounted on the lower portion of the lamp bulb is a circumferentially grooved clamp 25, and interposed betw'een and connecting the said clamp and av pulley 26 on the shaft 27 of the motor l is a belt 28, said belt beinO dis )osed in the mentioned circumferb u 'ential groove of the clamp 2o. l he clamp about its axis with the clamp 25.

The prism 17 illustrated isa 60 degree prism, and therefore when the lamp is turned about its axis through the medium of the motor t, belt 28 and clamp 25, andthe filamentv of the lamp is caused to glow, it will be apparent that as each of the filament ystretches of the lamp comes in focus with the lenses and the prism, a spectrum of light will be projected. 'Ihe said spectrum will move in the direction in which the lamp is turned until itis out of focus when it will'be followed by another stretch of filamenuand so on, the rapidity of the passages'of the filament stretches being controlled by the Y speed at which the lamp is Vturned about its axis. Manifestly the strength of the light,l

the size of the prism and the strength of the lenses controls the distance to which' the spectrum can be projected. It 'will also be appreciated that the shape of the spectrum takes the form of the filament stretches.

'As the lamp is rotated about its axis in the manner described with the filament glowing', it will be understood that the apparatus will project a rapid succession of scintillating spectrums with the result that the apparatus' will afford a freebeautiful colored lighting effect which may be used to advantage in show window and other illumination as well as in producingbeautiful colored light effectsv on the stage and in other places. Y At the left of Figure l I illustrate a plat 30 of frosted glass lthrough which the light maybe projected when desired in order to produce a subdued lighting effect. o

In Figure 6 I illustrate amodified prism 17a' characterized by walls/17b and a fillingA 17' of carbon disulpliide. A' pris-ni such as just described is desirable for some purposes inasmuch as it is' calculated to lend increased brillianc'y and strength to the lightv rays and to enhance the beauty of the varying or Vsciiitillating light afforded by the apparatus.

`- fha-ve ente-red iste.' a detail description of ltive arrangement of parts inasmuch as in the future practice of the invention various changes and modifications may be made suoli as fall within the scope of my invention as defined in my appended claims.

Having described my invention,` what I claim and desire to secure by Letters-Patent, is:-- w 80 l. In an illuminating apparatus, the combination of a lens, a prism located in front of the lens, and a rotary lamp located in rear of the lens and in line with the lens-and prism, and having a filament stretch arranged to intersect a linel extending through the lens and prism.

2. In an illuminating apparatus, 'the combination of a lens, a prism located in front of the lens, and a rotary incandescent electric lamp located in rear of the lens and having filament stretches arranged to be moved one after the other across the focus of the lens.

3. Y In an illuminating apparatus, the combination of a lens,a prism located in front of the lens, and a rotaryv incandescent electric lamp located in reark of the lens andl having filamentstretches arranged to be moved one after the other across the focus of the lens, with means comprised inthe apparatus for rotating the lampabout its axis. Y

4:. In an illuminating apparatus, the coinbinationrof a lens, a prism located infront Aof the lens, and a rotary incandescent elec-V tric lamp located in rear of the lens andhaying filament Ystretches arranged to be moved one after the other across the focus of the lens, with means comprised in the apparatus for rotating the lamp aboutits axis, and y means for maintaining the lamp under tension. i

5. An illuminating apparatusY comprising a casing, a lens tube carried in the forward wall of the casing and having double convex lenses at its ends, a prismv maintained in front ofthe lens tube, and a rotary incandescent electric 'lamp arranged in the casing andin rear of the lens tube and having lilainent stretches adapted to be inovedone after the other across the focusof the lens tube.' 120 r6. An illuminatingl apparatus comprising Y v a casing, a lens tube carried inthe forward wall of the casing and havingV double convexV lenses at its ends, la prism maintained Vinfront of the lens tube, and a rotary incandescent electric lamp-arrangedin the casing and in rearof the lens tube and having fila.V ment stretches adapted to be moved one after theother across the-"focus of the lens tube; v j the bulb ef the lampbeag provided. with aY 13o rotating element, and the said element being connected With lamp-rotating means eX- teriorlT of the casing.

7. In an illuminating apparatus, the combination of a lamp socket ofvcircular form in cross section and smooth interior, an incandescent electric lamp having a smooth shank of circular forni in cross section arranged in said socket, With a casing in which the lamp is arranged, a rotating element on the lamp bulb7 lamp rotating means exteriorly of the casing and connected with said rotating element, and tensioning means in the casing and engaging the upper end portion of the lamp bulb.

8. In an illuminating apparatus, the combination of a casing, a prism supported in front of the casing, a lens tube Carried by the front Wall of the casing and having Jforward and rear double convex lenses, a relector arranged in the casing in rear of the lens tube, a lamp socket, an incandescent electric lamp interposed between the lens tube and the reflector and having a shank journaled in said socket, a rotating element on the bulb of the lamp7 lamp rotating means eXteriOrly of the casing and connected With said element, and means about the lamp bulb and engaging said bulb to avert breaking of the same.

In testimony whereof I aiiiX m signature. FRANK D. C

LLINS. 

